Laminectomy chisel and guide apparatus
First Claim
1. A bone chisel and guide for use in laminectomy procedures, comprising a nerve root retractor and disc space spreader having a tubular body, said tubular body having an inside diameter, a proximal end, a distal end, and a tang extending from said distal end having a length and width for entering an intradiscal space between vertabral bodies and for contacting adjacent vertebral bodies and maintaining a disc space therebetween,a chisel body having a length extending through said tubular body inside diameter and having a proximal end and a distal end, said chisel body being configured for passage through said tubular body inside diameter and for extension of said proximal and distal ends from said tubular body proximal and distal ends respectively, said chisel body length providing extension of said chisel body distal end to positions adjacent said tang,cutting means on said chisel body distal end, said cutting means having a curvature substantially in conformance with the curvature of said tubular body inside diameter, andmeans on said chisel body proximal end for manipulating said cutting edge.
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Abstract
A set of bone chisels is disclosed for use in laminectomy procedures wherein portions of the lamina, facet, and pedicle have to be removed for successful performance of the surgery. The chisels are shaped for use in conjunction with a tubular nerve root retractor which also spreads or spaces vertebral bodies in accordance with some surgical procedures.
203 Citations
16 Claims
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1. A bone chisel and guide for use in laminectomy procedures, comprising a nerve root retractor and disc space spreader having a tubular body, said tubular body having an inside diameter, a proximal end, a distal end, and a tang extending from said distal end having a length and width for entering an intradiscal space between vertabral bodies and for contacting adjacent vertebral bodies and maintaining a disc space therebetween,
a chisel body having a length extending through said tubular body inside diameter and having a proximal end and a distal end, said chisel body being configured for passage through said tubular body inside diameter and for extension of said proximal and distal ends from said tubular body proximal and distal ends respectively, said chisel body length providing extension of said chisel body distal end to positions adjacent said tang, cutting means on said chisel body distal end, said cutting means having a curvature substantially in conformance with the curvature of said tubular body inside diameter, and means on said chisel body proximal end for manipulating said cutting edge.
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10. Chisel and guide apparatus for removal of bone from ones of adjacent vertabral bodies during laminectomy procedures, comprising
a tubular body having an inside diameter, a proximal end and a distal end, a tang extending from said distal end, said tang having a length and width for contacting adjacent vertabral bodies and for entering vertabral body intradiscal space to maintain a predetermined space therebetween, a chisel body formed to extend through said tubular body inside diameter and having a proximal end and a distal end, said chisel body proximal end extending from said tubular body proximal end for longitudinal and rotational manipulation, said chisel body being formed for maneuverability of said chisel body distal end adjacent said tang, and cutting means on said chisel body distal end.
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14. Apparatus for removal of bone from selected portions of adjacent vertabral bodies during lamenectomy procedures wherein the vertebral bodies have a vertabral disc space therebetween, comprising
a tubular body having a proximal end and a distal end and having an inside diameter, tang means attached to said tubular body distal end, said tang means having a width for contacting and spacing the adjacent vertabral bodies and for entering the vertabral disc space, chisel means having a chisel body for extending through said tubular body with a distal end extending from said tubular body distal end to positions adjacent said tang means, said chisel means further having a proximal end extending from said tubular body proximal end, means for manipulating said chisel means mounted on said chisel means proximal end, and cutting means on said chisel means distal end.
Specification